Boise (BOI) to Portland (PDX): On-Time Performance
Data through July 2026
When you fly BOI to PDX matters as much as anything else about the booking: the route swung from 97% on-time in October 2025 to just 78% in February 2025. Across the full period the route averages 90% on-time against a national 78%. Morning departures also hold up better than evening ones (94% vs 84%), which matters most in the rough months.
- On-time
- 90%
- arrived <15 min late
- Avg delay
- 7 min
- completed flights
- Cancelled
- 0.5%
- Flights/day
- 3.0
- last 12 months
- Duration
- 1h 24m
- scheduled
- Distance
- 344 mi
Best airline from BOI to PDX
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Alaska Airlinesmost reliable | 91% | 6 min | 0.1% | 788 |
| SkyWest Airlines | 89% | 7 min | 0.6% | 1,587 |
Monthly on-time trend
Best time to fly from BOI to PDX
Aim for departures around 6 a.m. (100% on-time); avoid 12 p.m. departures (78%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 89% | 7 min |
| Tuesdaybest | 94% | 4 min |
| Wednesday | 91% | 7 min |
| Thursday | 87% | 7 min |
| Friday | 85% | 9 min |
| Saturday | 93% | 5 min |
| Sunday | 89% | 8 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft57%
- Airline operations29%
- National airspace system10%
- Weather4%
Frequently asked questions
- How often are flights from BOI to PDX delayed?
- 11% of BOI–PDX flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 7 minutes.
- Which airline is most reliable from BOI to PDX?
- Alaska Airlines has the best on-time record on this route at 91%, based on 788 flights. 2 airlines flew BOI–PDX frequently enough to compare in this period.
- What is the best time of day to fly from BOI to PDX?
- Departures around 6 a.m. have the best record (100% on-time), while departures around 12 p.m. have the worst (78%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from BOI to PDX?
- The scheduled BOI–PDX flight time averages 1h 24m over 344 miles. Actual arrival times vary — flights on this route land 15+ minutes late 11% of the time.
- How often are BOI to PDX flights cancelled?
- 0.5% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from BOI to PDX?
- February 2025 was the roughest month in this dataset, with only 78% of arrivals on time. The best was October 2025 at 97%. If your dates are flexible, that 19-point gap is worth planning around.
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Based on 2,375 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.